Valve



g K r James 12. Z10, I 4 ONES.

Sept. 27, 1927. 1,643,305

J. D. LALOR VALVE Filed Dec. 15, 1924 WITN INVENTOR Patented Sept. 27,1927.

LAND.

' 1,643,305 P'EE'Ef orrlcs;

JAMES J). LAL'OR, OF BALTIMORE, MARYLAND, ASSIGNOR TO THE LALOE FUEL H4SYSTEM COMPANY, INC., 0]? BALTIMORE, MARYLAND, A CORPORATION OF MARY-Application filed December 15, 1924.- Serial No. 756,000.

Such valves are useful" for example in liquid fuel feed systems toprevent oil from flowing from a gravity tank into a building should theline piping be fractured, as well a as to automatically shut off thesupply when 1 the pumps'used in the system to force the fuel to theapparatus by which it is consumed-are stopped; or, in other words, to

prevent siphonic action under any of the stem 16 of saidpiston, treepositional adaforesaidsconditions.

My invention is directed toward securing in a valve of the kind referredto, absolute surety and infallibility of action; extreme simplicity ofdesign and construction; and reliability against derangement in longcontinued usage. N

From the detailed description hereinafterof a typical embodiment of minvention, will be manifest how the desi erata above outlined ma bereadily attained;'whi 1e the appended c aims serve to concisel definethose features which I believe to e-novel and patentable. V

With reference to the drawings, Fig. I is a sectional view of a valveconveniently emso bodying my invention. v

Figs. II and III are 'detail sections taken, respectively, as indicatedby the arrows H- Hand III-III in Fig. I; and,

Fi IV is a diagrammatic illustration 85 showing one of the practicaluses to which 4 the-valve of my invention may be put.

In these illustrations, the body or casing of the valve iscomprehensively designate by the numeral 1, and comprises a flow 4channel-with the inlet; and outlet ends 2, 3

respectively, set apart by va partition 4; said casing bein alsocharacterized by a lateral ofiset 5 wit anaxial bore 6 open to theoutlet side .3 of the channel. This ofiset shouldered and screw-threadedat 7 for re movable attachment of a cap piece 8, which together with thebore 6, constitute a dome a Y chamber 9. The movable element of theiston M valve 1 is in the form of a cylindric 10 whereof one end isdisposed for guidance in the dome bore-6, while its 0 pbsite end extendsthrough an orifice 11 int eintermediate straight portion 12 of thepartition4.

Thelatter end of the piston 10 is hollow as wherein the valve 1 s sh asinterposed v ,tion is applie indicated at 13, and open to the inlet side2 of the valve; while the wall surrounding the hollow "13 is providedwith a ring of radial ports 14, which, when the piston 10 is in theposition shown in Fig. I, are la ped by the partition 4 so as to closethe flow c annel 2, 3 against passage of fluid therethrough. As a meansfor .yieldmgly urging the piston 10 to this position, :that end thereofwhich is disposed in the dome chamber 9 is acted upon by a helicalcompression spring 15, the same beingheld centralized and against unduesidewise flex'ure by an engaging axial -ton 10. As shown, the :pin 18'isthrea'de as at 20 and screwedinto a boss 21 projecting from the valvebody 1, a polygonal head 22 at; the exterior serving to facilitate itsre-. moval when necessary -or' desired. 1 In order that thedome chamber9 may be at all times in communication with the out-'- let side 3 of theflow channel of the valve 1, that end of the piston 10 slidable thereinis longitudinally grooved as at 23 to provide by-pass channels for thispurpose. p In operation it will be seenthat when sucd to the outlet side'3 ofthe valve channel, the piston 10 will be shifted in opposition tothe compmion spring 15 by virtue of the access of said suction t roughthe grooves'23 to that end of the piston within the dome chamber 9 sothat .v

the ports 14: are moved beyond i. e. abovewith reference tothe position0 the valve' in Fig.1) the partition 4 and thus uncovered to permit flowthrough the valve 1. Upon cessation of the suctlon, the spring Ili'abtston 10 to the closed sition illustrated so as to intercept further owthrough the valve 1.

" immediately toautomaticall shift the '100 5 As previously stated, thevalve 1 of my mvention 1s especlally useful in connection with a fuelfeed system 01 oil burning installations. To make its function clear inthis connection, I vhave represented such an installationdiagrammatically in Fig. IV

in'a pipe line L leading from an exterior gravity supply tank T to apump P within a building B containing-emu different floors or levelsthefurnaces. or other apparatus to which the fuel is to be supplied underpressure. In responding to the suction or lift of the pump P, the pistonof the valve 1 will shift to open position with the ports 14 uncoveredfor passage ofthe fluid.

When'the pump P is stopped and the suction or lift ceases, the piston 10will, under urgence of the spring 15, automatically shift" to closedposition as already explained, the spring 15 being so designed as to becapable of overcoming with a slight excess, the head pressure of thefluid in the tank T. In the event of a leak or fracture in the pipe lineL,

y the valve 1, it will be seen, prevents the oil from the tank Tsiphoning or'flowing into ,the building B, yetpermits the pump P to feedthe necessary quantities of oil to the apparatus therein. The valve ofmy invention thus not onl serves to obviate gross wastage of fuel undersuch contingencies, but also acts as a safe-guard a ainst fire. I

Having thus described my invention, I

claim Y 1. A valve comprising a casing affording a flow channel; apartition extending across the channel with an intermediate straightportion having anorifice therethrough; a dome chamber open to the outletside of the channel; and a hollow-ended piston-havuncovered to permitflow through the valve, 7

- and in the absence of suction, to automatically shift so that saidports are brought intolapping relation with the partition to interceptflow through the valve. 1

2. A valve comprising a casing afiordmg a flow channel; a partitionextending across the channel witlr" an intermediate straight portionhaving an orifice therethrough; a

dome chamber open to the outlet side of thechannel; anda hollow-endedpiston having a ring of lateral ports afford ng flow passagetherethrough with its exterior surface befiyond saidports-'longitudinally grooved to 0rd communication at all times with theoutflow side of thechannel and slidably guided inthe dome chamber, thehollow end.

in the partition; said piston being adapted to respond formaintenance'in, open position with the ports therein uncovered to permitflow through the valve, to suction at the outlet side of the channelcommunicated to the dome chamber via the longitudinal grooves, and inthe absence of such suction to shift so that said portsv are-broughtinto lapping relation with the partition to inter cept flow through thevalve.

3. A valve comprising a casing affording a flow channel; a partitionextending across the channel. with an intermediate straight portionhaving an orifice therethrough; a dome chamberopen to the outlet side ofthe channel; 'a hollow-ended piston having a ring of lateral portsaffording flow passages therethrough with its exterior surfacebeyondsaid ports-longitudinally grooved and'slidably guided in the domechamber,

the hollow end of said piston extending through the orifice in thepartition, said piston being adapted to respond, for maintenance in openposition with the ports therein uncovered to permit flow through thevalve, to suction at .the outlet side of the channel communicated to thedome chamber via the longitudinal ooves; and a spring within the domecham er functionin in the absence of suction, to automatically s ift thepiston so that said ports are brought into lapping relation with thepartition to intercept flow through the valve.

4. A valve comprising a casing aifording a flow channel; an orificedpartitlon extend ing across the channel; a dome chamber open to theoutlet side ofthe channel; a laterallyported piston with one end thereoflongitudinally glrooved and slidably guided in the dome c amber, and theother end thereof extending through the orifice of the partition, saidpiston being adapted to respond, formaintenance in open position withthe ports 'therein uncovered to permit flow through the valve, tosuction at the outlet side of the channel communicatedvto the domechamber via the lon 'tudinal grooves; a spring within the dome c amberfunctionin in absence of suction, to automatically shi t the piston sothat said plorts are brought into lapping relation-wit the partition tointercept flow through the valveand a stop pin engaging an' axlal recessin the piston to determine the extent-of such shifting. a In testimonywhereof, I have hereunto signedmy name atBa-ltimore, Maryland, this 12thday of November, 1924. Y

JAMES D. LALOR.

